<?php
/**
 * $Id: tiny_mce_gzip.php 315 2007-10-25 14:03:43Z spocke $
 *
 * @author Moxiecode
 * @copyright Copyright � 2005-2006, Moxiecode Systems AB, All rights reserved.
 *
 * This file compresses the TinyMCE JavaScript using GZip and
 * enables the browser to do two requests instead of one for each .js file.
 * Notice: This script defaults the button_tile_map option to true for extra performance.
 */

  // Set the error reporting to minimal.
  @error_reporting(E_ERROR | E_WARNING | E_PARSE);

  // Get input
  $plugins = explode(',', getParam("plugins", ""));
  $languages = explode(',', getParam("languages", ""));
  $themes = explode(',', getParam("themes", ""));
  $diskCache = getParam("diskcache", "") == "true";
  $isJS = getParam("js", "") == "true";
  $compress = getParam("compress", "true") == "true";
  $core = getParam("core", "true") == "true";
  $suffix = getParam("suffix", "_src") == "_src" ? "_src" : "";
  $cachePath = realpath("."); // Cache path, this is where the .gz files will be stored
  $expiresOffset = 3600 * 24 * 10; // Cache for 10 days in browser cache
  $content = "";
  $encodings = array();
  $supportsGzip = false;
  $enc = "";
  $cacheKey = "";

  // Custom extra javascripts to pack
  $custom = array(/*
    "some custom .js file",
    "some custom .js file"
  */);

  // Headers
  header("Content-type: text/javascript");
  header("Vary: Accept-Encoding");  // Handle proxies
  header("Expires: " . gmdate("D, d M Y H:i:s", time() + $expiresOffset) . " GMT");

  // Is called directly then auto init with default settings
  if (!$isJS) {
    echo getFileContents("tiny_mce_gzip.js");
    echo "tinyMCE_GZ.init({});";
    die();
  }

  // Setup cache info
  if ($diskCache) {
    if (!$cachePath)
      die("alert('Real path failed.');");

    $cacheKey = getParam("plugins", "") . getParam("languages", "") . getParam("themes", "") . $suffix;

    foreach ($custom as $file)
      $cacheKey .= $file;

    $cacheKey = md5($cacheKey);

    if ($compress)
      $cacheFile = $cachePath . "/tiny_mce_" . $cacheKey . ".gz";
    else
      $cacheFile = $cachePath . "/tiny_mce_" . $cacheKey . ".js";
  }

  // Check if it supports gzip
  if (isset($_SERVER['HTTP_ACCEPT_ENCODING']))
    $encodings = explode(',', strtolower(preg_replace("/\s+/", "", $_SERVER['HTTP_ACCEPT_ENCODING'])));

  if ((in_array('gzip', $encodings) || in_array('x-gzip', $encodings) || isset($_SERVER['---------------'])) && function_exists('ob_gzhandler') && !ini_get('zlib.output_compression')) {
    $enc = in_array('x-gzip', $encodings) ? "x-gzip" : "gzip";
    $supportsGzip = true;
  }

  // Use cached file disk cache
  if ($diskCache && $supportsGzip && file_exists($cacheFile)) {
    if ($compress)
      header("Content-Encoding: " . $enc);

    echo getFileContents($cacheFile);
    die();
  }

  // Add core
  if ($core == "true") {
    $content .= getFileContents("tiny_mce" . $suffix . ".js");

    // Patch loading functions
    $content .= "tinyMCE_GZ.start();";
  }

  // Add core languages
  foreach ($languages as $lang)
    $content .= getFileContents("langs/" . $lang . ".js");

  // Add themes
  foreach ($themes as $theme) {
    $content .= getFileContents( "themes/" . $theme . "/editor_template" . $suffix . ".js");

    foreach ($languages as $lang)
      $content .= getFileContents("themes/" . $theme . "/langs/" . $lang . ".js");
  }

  // Add plugins
  foreach ($plugins as $plugin) {
    $content .= getFileContents("plugins/" . $plugin . "/editor_plugin" . $suffix . ".js");

    foreach ($languages as $lang)
      $content .= getFileContents("plugins/" . $plugin . "/langs/" . $lang . ".js");
  }

  // Add custom files
  foreach ($custom as $file)
    $content .= getFileContents($file);

  // Restore loading functions
  if ($core == "true")
    $content .= "tinyMCE_GZ.end();";

  // Generate GZIP'd content
  if ($supportsGzip) {
    if ($compress) {
      header("Content-Encoding: " . $enc);
      $cacheData = gzencode($content, 9, FORCE_GZIP);
    } else
      $cacheData = $content;

    // Write gz file
    if ($diskCache && $cacheKey != "")
      putFileContents($cacheFile, $cacheData);

    // Stream to client
    echo $cacheData;
  } else {
    // Stream uncompressed content
    echo $content;
  }

  /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

  function getParam($name, $def = false) {
    if (!isset($_GET[$name]))
      return $def;

    return preg_replace("/[^0-9a-z\-_,]+/i", "", $_GET[$name]); // Remove anything but 0-9,a-z,-_
  }

  function getFileContents($path) {
    $path = realpath($path);

    if (!$path || !@is_file($path))
      return "";

    if (function_exists("file_get_contents"))
      return @file_get_contents($path);

    $content = "";
    $fp = @fopen($path, "r");
    if (!$fp)
      return "";

    while (!feof($fp))
      $content .= fgets($fp);

    fclose($fp);

    return $content;
  }

  function putFileContents($path, $content) {
    if (function_exists("file_put_contents"))
      return @file_put_contents($path, $content);

    $fp = @fopen($path, "wb");
    if ($fp) {
      fwrite($fp, $content);
      fclose($fp);
    }
  }
?>